import org.junit.Test;
import org.springframework.util.DigestUtils;

public class guest {
    @Test
    public void guest() {
        String salt = "123456";
        String pswd = "guest" + salt;

        String saltPswd = DigestUtils.md5DigestAsHex(pswd.getBytes());
        System.out.println(saltPswd);
    }
}
